LED fluorescent lamp

Abstract

A light-emitting diode (LED) lamp which can replace a typical fluorescent lamp is provided. The LED lamp comprises external connection pins connected to terminals of an electronic or magnetic fluorescent lamp ballast, capacitor pairs connected to each of the external connection pins, diodes connected to each of the capacitor pairs and a LED array connected between the diodes, wherein an first external connection pin, a first capacitor pair, a first diode, an LED array, a second diode, a second capacitor pair and a second external connection pin are connected in series. Here, the first and second capacitor pairs include capacitors connected back to back. The LED lamp also further comprises a diode connected in anti-parallel with a series circuit of the second diode and the LED array, and another diode connected in anti-parallel with a series circuit of the first diode and the LED array.

What is claimed is: 
     
       1. An LED lamp comprising:
 a first external connection pin connected to a first terminal of an electronic or magnetic fluorescent lamp ballast; 
 a second external connection pin connected to a second terminal of the electronic or magnetic fluorescent lamp ballast; 
 an LED array disposed between the first external connection pin and the second external connection pin; 
 a first diode having an anode connected to the first external connection pin and a cathode connected to an anode terminal of the LED array; 
 a second diode having an cathode connected to the second external connection pin and an anode connected to a cathode terminal of the LED array; 
 a third diode having an anode connected to the cathode of the second diode and a cathode connected to the cathode of the first diode; 
 a fourth diode having an anode connected to the anode of the second diode and a cathode connected to the anode of the first diode; and 
 one or more capacitor pairs intervening between the first external connection pin and the second external connection pin and connected in series with the LED array and the first and second diodes, 
 wherein each of the one or more capacitor pairs includes two polarized capacitors connected back to back. 
 
     
     
       2. The LED lamp of  claim 1 , wherein the one or more capacitor pairs comprising at least one of
 a first capacitor pair intervening between the first external connection pin and the first diode; and 
 a second capacitor pair intervening between the second external connection pin and the second diode. 
 
     
     
       3. The LED lamp of  claim 1 , further comprising:
 a fifth diode intervening between the cathode of the first diode and the anode terminal of the LED array, such that the cathode of the third diode is connected to an anode of the fifth diode; and 
 a sixth diode intervening between the cathode terminal of the LED array and the anode of the second diode, such that the anode of the fourth diode is connected to a cathode of the sixth diode. 
 
     
     
       4. The LED lamp of  claim 3 , wherein the one or more capacitor pairs comprising at least one of
 a first capacitor pair intervening between the first external connection pin and the first diode; and 
 a second capacitor pair intervening between the second external connection pin and the second diode. 
 
     
     
       5. An LED lamp comprising:
 a first external connection pin connected to a first terminal of an electronic or magnetic fluorescent lamp ballast; 
 a second external connection pin connected to a second terminal of the electronic or magnetic fluorescent lamp ballast; 
 an LED array disposed between the first external connection pin and the second external connection pin; 
 a first group of diodes connected between the first external connection pin and an anode terminal of the LED array, the first group of diodes including two or more diodes connected in series with each other and an anode of a first diode of the first group of diodes being connected to the first external connection pin and a cathode of a second diode of the first group of diodes being connected to the anode terminal of the LED array; 
 a second group of diodes connected between the second external connection pin and a cathode terminal of the LED array, the second group of diodes including two or more diodes connected in series with each other and an anode of a first diode of the second group of diodes being connected to the cathode terminal of the LED array and a cathode of a second diode of the second group of diodes being connected to the second external connection pin; 
 one or more capacitor pairs intervening between the first external connection pin and the second external connection pin and connected in series with the LED array and the first and second diodes; 
 a third diode having an anode connected to the cathode of the second diode of the second group of diodes and a cathode connected to a cathode of one of the diodes of the first group of diodes; and 
 a fourth diode having an anode connected to an anode of one of the diodes of the second group of diodes and a cathode connected to the anode of the first diode of the first group of diodes, 
 wherein each of the one or more capacitor pairs includes two polarized capacitors connected back to back. 
 
     
     
       6. The LED lamp of  claim 5 , wherein the one or more capacitor pairs comprising at least one of
 a first capacitor pair intervening between the first external connection pin and the first group of diodes; and 
 a second capacitor pair intervening between the second external connection pin and the second group of diodes. 
 
     
     
       7. An LED lamp comprising:
 a plurality of external connection pins having at least, a first external connection pin connected to a first terminal of an electronic or magnetic fluorescent lamp ballast and a second external connection pin connected to a second terminal of the electronic or magnetic fluorescent lamp ballast; 
 an LED array disposed between the first external connection pin and the second external connection pin; 
 a first diode having an anode connected to the first external connection pin and a cathode connected to an anode terminal of the LED array; 
 a second diode having an cathode connected to the second external connection pin and an anode connected to a cathode terminal of the LED array; 
 a third diode having an anode connected to a third external connection pin and a cathode connected to the anode terminal of the LED array; 
 a fourth diode having an cathode connected to a fourth external connection pin and an anode connected to the cathode terminal of the LED array; 
 a fifth diode having an anode connected to the anode of the second diode and a cathode connected to the anode of the first diode; 
 a sixth diode having an anode connected to the cathode of the second diode and a cathode connected to the cathode of the first diode; 
 a seventh diode having an anode connected to the cathode of the fourth diode and a cathode connected to the cathode of the third diode; 
 an eighth diode having an anode connected to the anode of the fourth diode and a cathode connected to the anode of the third diode; 
 a first capacitor pair intervening between the first external connection pin and the first diode; 
 a second capacitor pair intervening between the second external connection pin and the second diode; 
 a third capacitor pair intervening between the third external connection pin and the third diode; and 
 a fourth capacitor pair intervening between the fourth external connection pin and the fourth diode, 
 wherein each of the first, second, third and fourth capacitor pairs includes two polarized capacitors connected back to back.